Floor polisher



June 11, 1929- R. v. MCCURDY` ET AL FLOOR POLI SHER Filed Jan ll, 1927 l?. l( Mc Conor.

C0'. NCCI/Roy.

Patented .lune 11, 1929.

usarse ;s'rArss RAYMOND v. MCCURDY, or SACRAMENTO, y

v or LrNeoLN'NnBnAsxA;

CALIFORNIA, AND cLFroRD Enoes vroi-.asians i vAppnammi ined January' 1,1, 192'?. serial No. 150,502.

Figure 1 is a view in perspective of ourl floor polisher, parts being broken away to disclose the interior construction.

Figure 2 is a view in side elevation of the floor polisher.

Figure 3 3--3 of Figure 2. f

Figure 4 is a sectional view on the line 4-4 whereby the entire iioorpolisher may be' moved about from place to place. vThe frame includes two side plates 10 which .are 1nter' nally flanged at their upper edges, a cover 11 of sheet metal being secured by means of screws to the flanges. The plates 10 are also heavily ribbed on their outer surfaces throughout almost their entire edges at 12', the rib 12 being designed for strengthening purposes. rllhe rib is interrupted at the middie portion of the bottom edge to permit ad-V justment of the side plates 13 of the truck. ll`he'truck as best shown in Figure 1 includes side plates 13 for supporting a pair of shafts 14, the shafts being journalled in bosses .15 on the side plates. These bosses are aper tured at 16 for lubrication purposes. Each shaft 14 has secured thereto a pair of supporting wheels 17 which are adapted to carry the entire weight ofthe floor polisher. wheels 17 are preferably made'from soft rubber er other material which has cushioning effect when the floor polisher is in use. The side plates 10 are cut away at 18 to permit up and down movements of the Vplates 13, the adjustment in height being made by means of the nuts 19. By this means it is possible to adjust the iioor polisher according to the is a sectional view on the line` The wear on the brushes or to increase or decrease the action of the brushes on the floor.

It should be noted that the frame is relatively low as shown in Figure 2. The handle Ais secured to the frame at apoint considerably above the center` of gravity. Y The handle in* cludes a bail 21 which is connected to the the side plates 10, the Aside plates are provided with bosses 23 which space the armsof they bail so as to clear the rib 12, as bestshown in Figure 5. n y

The polishing element of the iioor polisher comprises two rotary brushes 24, one at each end of the frame. These brushes have relatively stiff bristles and they are secured to the frame in the manner shown in Figure. 3.' The AH. Meermin?,l

retira oifiici..v

Y handle proper 22. For securing the bail 21 to side plates 10 are provided with bosses 25 and i the brushes 24 are provided with ball races 26. Short axles27 pass through the bosses 25 and their inner conical ends are held in the ball races 26. For keeping the axles 27 in position, set screws28 pass through suitable ap ertures in the bosses 25 and against the axles. The brushes 24are driven by the electric motor 29 through -sprocket chains 30 which travel over sprocket wheels at the opposite extremities of the shaft of the motor 29. It should be noted that both brushes 24 are driven in the same direction so that they assist materially in propelling the entire floor polisher over the ioor.V The motor 29 rests on two bars 31 which are securedto inwardly projecting lugs 32 on theside members 10..

The floorv polisher as above described is light in weight, the entire weight being about twenty pound-s: The bearings are made relatively frictionless, and this together with the light weight makes itpossible to'operate the iioor polisher with very little 4muscular effort and with very little drain on the electric current. gether, a portion of the` energy from the .motor is used for the forward propulsion, thusl still furtherrelieving the operator of` unnecesary muscular effort. i

Havingthus described our invention in such full, clear, and exact terms that its construction and operation will be readily understood .casing including a pair of side plates having Because the brushes both rotate to- 'i Y straight bottom edges and semi elliptical' top edges, a sheet metal cover secured to said side plates at the Atop edges thereof, a pair yof rotary brushes positionedewithin the end portions of said casing and having axes journailed in said side plates, a truck including a pair of vertically adj ustablemembers secured to said side plates, slots in said side plates shafts ou'rnalled in said vertically adjustable members and movablein the slots and, supporting Wheels secured to said shafts, a platform secured to said'si'de plates below the center of mass of said floor polishingmachine, a

dian vertical transverse plane thereof, and a handle having abifurcated portionpivotally secured to said side plates directly above thev center of mass of said floor polishing machine' and beneath the upper extremity thereof.

In testimony whereof Weaiix our signay' tures. i Y

RAYMOND V. MCCURDY. CLIFFORD H. MCCURDY. 

